Did JRRT encourage new ME stories?

[Raynor]

The passage in question appears after the much quoted paragraph about the mythology to be dedicated to England:

Originally Posted by Letter #131

The cycles should be linked to a majestic whole, and yet leave scope for other minds and hands, wielding paint and music and drama. Absurd.

Of course, such an overweening purpose did not develop all at once. The mere stories were the thing. They arose in my mind as 'given' things, and as they came, separately, so too the links grew. An absorbing, though continually interrupted labour (especially since, even apart from the necessities of life, the mind would wing to the other pole and spend itself on the linguistics): yet always I had the sense of recording what was already 'there', somewhere: not of 'inventing'.